我之前做可变增益的电压放大,在用的是模拟控制的可变增益放大器,现在方案要求采用数字控制,有如下要求:
1. 带宽在20MHz以上,主要工作在2.5MHz
2. 增益在20dB左右
3. 增益步进值越小越好
请问有没有合适的可编程的放大器,请推荐一两款。
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